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[DNR] Gypsy moth treatments at Purdue University/West Lafayette expected May 19
Start Date: 5/5/2014Start Time: 12:00 AM
End Date: 5/5/2014
Entry Description
Gypsy moth treatments for the infestation at Purdue University/West Lafayette have been rescheduled to Monday, May 19, depending on weather.

The treatments were originally planned to start Monday, May 12, but were delayed because weather forecasts were not within the guidelines for treatment.

Current weather forecasts indicate conditions may be within guidelines for Monday. A final decision on whether to move forward with Monday treatments will be made Friday afternoon.

The Purdue/West Lafayette site will receive two aerial treatments of Btk (Bacillus thuringiensis var. kurstaki) spaced 4 to 10 days apart. A mating-disruption treatment is planned for late June to complete treatments to eradicate the infestation

Treatment information is posted at and on the Indiana gypsy moth Twitter site at
A map of the treatment site is also at
During the treatment, people in and near the treatment area might notice a yellow crop duster airplane flying 50-125 feet above treetops as it releases Btk (Bacillus thuringiensis var. kurstaki) Foray 76B, a bacterium commonly found in the soil and frequently used in organic farming. Btk kills gypsy moth caterpillars as they feed on tree leaves by disrupting their digestive systems.
The flight will start at sunrise and should be completed within ½-1 hour.

Btk has been used for decades by organic gardeners and has an excellent safety record with people and animals. People who live or work near the treatment areas might choose to take common-sense precautions, including staying inside when the planes are flying and for about 30 minutes after treatments are complete. This gives the material time to settle out of the air and adhere to treetops.

In addition to following weather guidelines for treatment, DNR staff monitors leaf development. If leaf development slows because of weather, the treatment may be delayed for that reason and a press release will announce this change.
People with questions about this project can call the Indiana DNR toll-free at 1-866-NO EXOTIC (1-866-663-9684) or Purdue Public Information office (765) 494-2084.
Contact Information:
Name: Phil Marshall
Phone: (317) 232-4189
Entry Type:
Press Release
Entry Category:
Announcements Category:
  • Business & Agriculture
  • Visiting & Playing
  • Agency Name
    Natural Resources, Indiana Department of

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